Tramp's method "kubernetes" supports now optional namespace

* doc/misc/tramp.texi (Inline methods): Extend Kubernetes host
name syntax by an optional namespace.
(Kubernetes setup): Mention optional namespace part of the host name.

* etc/NEWS: Tramp's method "kubernetes" supports now optional namespace.
Fix typos.

* lisp/net/tramp-container.el (tramp-kubernetes-namespace):
Initialize with nil.  Adapt docstring.
(tramp-kubernetes--name-regexp): New defconst.
(tramp-kubernetes--host-name-regexp): Change in order to cover
also an optional namespace.  (Bug#59797)
(tramp-kubernetes--namespace): New defun.
(tramp-kubernetes--context-namespace): Use it.
(tramp-skeleton-kubernetes-vector): Add sanity check for
superfluous user name or port number.

1 files changed, 8 insertions, 4 deletions

diff --git a/doc/misc/tramp.texi b/doc/misc/tramp.texi
index eddf0272641..e548432700f 100644
--- a/doc/misc/tramp.texi
+++ b/doc/misc/tramp.texi
@@ -999,9 +999,11 @@ if desired.
 @cindex @option{kubernetes} method
 
 Integration for containers in Kubernetes pods.  The host name is
-@samp{@var{pod}}, or @samp{@var{container}.@var{pod}} if an
-explicit container name shall be used.  Otherwise, the first container
-in a pod is used.
+@samp{@var{pod}}, or @samp{@var{container}.@var{pod}} if an explicit
+container name shall be used.  Otherwise, the first container in a pod
+is used.  @samp{@var{pod}%@var{namespace}} as host name allows to use
+another namespace but the default one.  This can also be combined with
+the @samp{@var{container}.} prefix.
 
 This method does not support user names.
 
@@ -3246,7 +3248,9 @@ by setting the pod annotation
 @vindex tramp-kubernetes-namespace
 @value{tramp} uses the default Kubernetes context and namespace.  If
 another context or namespace shall be used, configure the user options
-@code{tramp-kubernetes-context} and @code{tramp-kubernetes-namespace}.
+@code{tramp-kubernetes-context} or @code{tramp-kubernetes-namespace},
+respectively.  An explicit @samp{%@var{namespace}} postfix in the host
+name takes precedence.
 
 
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